Dirt On Paper; Wrinkles On Paper - Brother HL-3040CN Service Manual

3.4

Dirt on Paper

< >
User Check
- Check if the paper is loaded into the paper tray correctly.
- Turn over the stack of paper in the paper tray, or try rotating the paper 180° in the paper tray.
- Replace the waste toner box with a new one.
Step
1 Fuser unit dirty
2 Dirt in the paper
feed system
3 Belt unit dirty
4 Waste toner
sensor failure
5 Main PCB failure
3.5

Wrinkles on Paper

< >
User Check
- Check if the paper is loaded into the paper tray correctly.
- Turn over the stack of paper in the paper tray, or try rotating the paper 180° in the paper tray.
- Check if the thickness of the paper is 75 to 105g/m
Step
1 Fuser unit failure
Cause
Is there dirt around the
entrance of the fuser
unit?
Is the pressure roller
dirty?
Is the paper tray or feed
system on the drum unit
dirty with toner?
Does dirt on the paper
disappear after
replacing the belt unit
with a new one?
Is the waste toner box
full of toner?
Is the problem solved
after replacing the main
PCB ASSY?
Cause
Do wrinkles on the
paper disappear after
replacing the fuser unit
with a new one?
Check Result
Yes
Yes
Yes
Yes
No
Yes
2
.
Check Result
Yes
3-54
Remedy
Clean the entrance of
the fuser unit.
Clean the pressure
roller.
Wipe dirt off.
Replace the belt unit.
Replace the waste toner
sensor.
Replace the main PCB
ASSY.
Remedy
Replace the fuser unit.
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